I could understand running the A/C just before a run, to cool the intake air, but not during the race. I think running the A/C clutch coil and compressor eat up more horsepower than would be generating by cooling intake temps during the run.
Also, about spraying cooled gases/liquids across the intercooler wouldn't benifit much unless you hit it before boost condition (very important). You have to factor in the amount of time it takes to actually cool down the intercooler exterior(aluminum), and then air inside the intercooler before it's under boost. I did a setup like this on my '87 rx7 turbo, and didn't see much of an increase unless I cooled the intercooler about 10 seconds before I went under boost for freeway driving. You'll get a lot more results sitting still like at a dyno, because you don't have the outside air temps flowing into the intercooler working against you heating up the same elements you are trying to cool say at 45mph. That's why I'd throw out the dyno results and am interested in track times. OR you could go with a liquid intercooler, and toss in a bunch of ice, or run your A/C to cool the water before runs. Liquid intercoolers prevent that spike of heat surge, but are heavier, and tend to retain heat under constant boost conditions, which arent very common.
